WO2006057165A1 - Balance universelle - Google Patents

Balance universelle Download PDF

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Publication number
WO2006057165A1
WO2006057165A1 PCT/JP2005/020563 JP2005020563W WO2006057165A1 WO 2006057165 A1 WO2006057165 A1 WO 2006057165A1 JP 2005020563 W JP2005020563 W JP 2005020563W WO 2006057165 A1 WO2006057165 A1 WO 2006057165A1
Authority
WO
WIPO (PCT)
Prior art keywords
weighing
combination
chambers
weighed
hopper
Prior art date
Application number
PCT/JP2005/020563
Other languages
English (en)
Japanese (ja)
Inventor
Hiroshi Higuchi
Shozo Kawanishi
Taketoshi Okamura
Original Assignee
Yamato Scale Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yamato Scale Co., Ltd. filed Critical Yamato Scale Co., Ltd.
Priority to EP20050805980 priority Critical patent/EP1832856B1/fr
Priority to US11/720,073 priority patent/US7667147B2/en
Publication of WO2006057165A1 publication Critical patent/WO2006057165A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
    • G01G19/387—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for combinatorial weighing, i.e. selecting a combination of articles whose total weight or number is closest to a desired value
    • G01G19/393—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for combinatorial weighing, i.e. selecting a combination of articles whose total weight or number is closest to a desired value using two or more weighing units

Definitions

  • the present invention relates to a combination weigher including a plurality of weighing hoppers each having two weighing chambers.
  • each weighing hopper has two chambers (weighing chambers).
  • each weighing hopper 4 has two weighing chambers 4a and 4b, and is configured such that an object to be weighed can be discharged separately from each weighing chamber 4a and 4b.
  • the supply hopper 3 is configured to be able to selectively discharge an object to be weighed into the weighing chamber 4a and the weighing chamber 4b of the weighing hopper 4 disposed below the supply hopper 3.
  • each weighing hopper 4 when the weighing object is supplied only to one weighing chamber, for example, the weighing chamber 4a, the weight of the weighing object in the weighing chamber 4a is measured by the weight sensor 5, and the measured value is It is sent to the control unit 10.
  • the control unit 10 subtracts the weight of the weighing object in the weighing chamber 4a that has been previously weighed from the total weight of the weighing objects in the two weighing chambers 4a and 4b. Calculate the weight of the object to be weighed and perform combination calculation.
  • the combination calculation is performed based on the weight of the objects to be weighed in the weighing chambers 4a and 4b of each weighing hopper 4 obtained as described above, and the total weight of the objects to be weighed is within the predetermined weight range.
  • the objects to be weighed are discharged to the collecting chute 6 and stored in the collecting hopper 7 by opening and closing the gates of the measuring chambers 4 a and 4 b selected for the obtained combination. Further, the control unit 10 opens and closes the gate of the collecting hopper 7, and the objects to be weighed in the collecting hopper 7 are sent to, for example, a packaging machine (not shown).
  • each weighing hopper 4 is divided into two weighing chambers 4a and 4b, so that it is almost equivalent to a combination weigher having, for example, ten weighing hoppers not divided into two chambers. If performance (weighing accuracy) is to be provided, it is sufficient to provide 5 weighing hoppers 4 and expensive weight The number of sensors 5 is half.
  • Patent Document 1 Japanese Patent Publication No. 5-87766
  • Patent Document 2 Japanese Patent Publication No. 6-27664
  • one of the weighing chambers with the above objects to be weighed in is selected as a combination, one of the weighing chambers is also empty and cannot participate in the combination during the next combination calculation.
  • the number of combinations decreases. Increase in the number of combinations • It is well known that the measurement accuracy improves / decreases as the number decreases. As the number of combinations decreases as described above, the measurement accuracy decreases.
  • the present invention has been made to solve the above-described problems, and in a combination weigher using a weighing hopper having two weighing chambers, a combination weigher capable of improving weighing accuracy.
  • the purpose is to provide.
  • the combination weigher of the present invention has two weighing chambers, weighs the objects to be weighed in the respective weighing chambers, and each of the weighing chambers.
  • a plurality of weighing hoppers capable of discharging the objects to be weighed per chamber, and the weighing hoppers are arranged above the weighing hoppers, and are respectively disposed in the two weighing chambers of the corresponding weighing hoppers.
  • a plurality of supply means for selectively feeding the objects to be weighed, and a combination operation based on the weight of the objects to be weighed put in the weighing chamber of each of the weighing hobbies Select a combination of the weighing chambers in which the total weight of the objects to be weighed is within a predetermined weight range, and perform a discharge operation to discharge the objects to be weighed from the selected weighing chamber.
  • the control means is configured to perform the combination calculation by restricting the number of weighing hoppers selected for the combination to a predetermined number or less simultaneously in both the two weighing chambers.
  • each of the supply means when the combination calculation and the discharge operation are repeatedly performed, during the period from the currently performed combination calculation to the next combination calculation performed, An object to be weighed can be put into only one of the two weighing chambers of the weighing hopper, and the control means determines the number of the weighing hoppers to be selected for the combination by both of the two weighing chambers at the same time.
  • the combination calculation may be performed by limiting the number to one or less.
  • the present invention has the above-described configuration, and has an effect that it is possible to improve weighing accuracy in a combination weigher using a weighing hopper having two weighing chambers.
  • FIG. 1 is a schematic diagram showing a schematic configuration of a combination weigher according to an embodiment of the present invention.
  • FIG. 2 is a timing chart of the operation of the combination weigher according to the embodiment of the present invention.
  • FIG. 3 is a table showing simulation results in the embodiment of the present invention. Explanation of symbols
  • FIG. 1 is a schematic diagram showing a schematic configuration of a combination weigher according to an embodiment of the present invention.
  • a conical dispersion is used to disperse the objects to be weighed supplied from an external supply device radially by vibration.
  • Feeder 1 is provided.
  • a linear feeder 2 is provided for feeding an object to be weighed sent from the dispersion feeder 1 to each supply hopper 3 by vibration.
  • a plurality of supply hoppers 3 and weighing hoppers 4 are respectively provided below the linear feeder 2 and arranged in a circular shape.
  • a collecting chute 6 having a discharge port at the lower center is provided, and a collecting hopper 7 is provided at the discharge port of the collecting chute 6.
  • Each weighing hopper 4 has two weighing chambers 4a and 4b. Gates are provided in the respective weighing chambers 4a and 4b. By opening each gate, each weighing chamber 4a and 4b is separately provided. It is a configuration that can discharge the object to be weighed.
  • the supply hopper 3 is provided with two gates that can be driven independently. By opening each gate, the object to be weighed can be selectively discharged to the weighing chamber 4a and the weighing chamber 4b of the weighing hopper 4. It is a configuration.
  • Each weighing hopper 4 is provided with a weight sensor 5 such as a load cell for measuring the weight of the object in the weighing hopper 4. The weight value measured by the weight sensor 5 is sent to the control unit 10.
  • the weight sensor 5 measures the weight of the weighing object in the weighing chamber 4a when the weighing object is supplied only to one weighing chamber, for example, the weighing chamber 4a. Further, when an object to be weighed is supplied to the other weighing chamber 4b, the total weight of the objects to be weighed in the two weighing chambers 4a and 4b is weighed by the weight sensor 5.
  • the control unit 10 subtracts the weight of the weighing object in the weighing chamber 4a that has been previously weighed from the total weight of the weighing objects in the two weighing chambers 4a and 4b.
  • the weights of the objects to be weighed are calculated and combined based on the weights of the objects to be weighed in the weighing chambers 4a and 4b of each weighing hopper 4. Perform the operation.
  • the total weight of the objects to be weighed in from the weighing chambers 4a and 4b of the plurality of weighing hoppers 4 is within an allowable range with respect to the combined target weight (place Select the combination weighing chamber within the constant weight range), and the total weight of the objects to be weighed in the weighing chambers 4a and 4b selected for the combination is the combined weight. If there are multiple combinations in which the total weight of the objects to be weighed is within the allowable range for the combined target weight, the combination is determined to be the one that minimizes the difference between the total weight of the objects to be weighed and the combined target weight. To do.
  • the object to be weighed supplied from the external supply device to the dispersion feeder 1 is sent to each linear feeder 2 by the vibration of the dispersion feeder 1, and further sent to each supply hopper 3 by the vibration of each linear feeder 2. It is done.
  • the object to be weighed is put into one of the two weighing chambers 4a and 4b of the weighing hopper 4. This operation is initially repeated twice, and the objects to be weighed are put into both weighing chambers 4a and 4b.
  • the operation of the above distributed feeder 1 and linear feeder 2 and the opening / closing operation of the two gates of the supply hopper 3 are also controlled by the control unit 10.
  • the control unit 10 performs the combination calculation based on the weight of the objects to be weighed in the weighing chambers 4a and 4b, and then turns on the gates of the weighing chambers 4a and 4b selected for the combination. Open and close. As a result, the objects to be weighed are discharged from the weighing chambers 4a and 4b.
  • the control unit 10 receives the input command signal from, for example, a packaging machine (not shown) arranged below the collective hopper 7, opens and closes the gate of the collective hopper 7, and measures the objects in the collective hopper 7. Is sent to the packaging machine.
  • the collecting hopper 7 may not be provided, by providing the collecting hopper 7, the objects to be weighed discharged from the weighing chambers 4a and 4b are once stored in the collecting hopper 7 and are to be weighed. Since the product is discharged to the packaging machine in a solid state, the discharge time is shortened, and the weight of the object to be weighed in the seal (sealing) part of the upper and lower ends of the bag made by the packaging machine operated at high speed is reduced. Intrusion can be prevented.
  • FIG. 2 is a timing chart of the operation in the combination weigher of the present embodiment.
  • Figure 2 T is one weighing cycle, and such a weighing cycle is repeated continuously.
  • Each weighing cycle ⁇ consists of a discharge and supply time tl, a stabilization time t2, and a combination time t3.
  • the discharge and supply time tl is, for example, the gate opening / closing of the collective hopper 7 operated in response to the input command signal a from the packaging machine, the gate opening / closing of the weighing chambers 4a, 4b selected for the combination, and This is the time required to open and close the supply hopper 3 that is operated to supply the objects to be weighed to the weighing chambers 4a and 4b.
  • the stabilization time t2 is the stabilization time of the weight sensor 5 attached to the weighing hopper 4.
  • the combination time t3 is a time for performing a combination calculation and the like, and the time t3 includes the waiting time of the input command signal from the packaging machine.
  • each weighing cycle T at the discharge and supply time tl, the gate of the collecting hopper 7 is opened and closed in response to the input command signal a output from the packaging machine, and the weighing object is discharged to the packaging machine.
  • the gates of the weighing chambers 4a and 4b selected for the combination are opened and closed, the objects to be weighed are discharged to the collecting hopper 7, and the objects to be weighed discharged to the packaging machine in the next cycle are transferred to the collecting hopper 7. Can be stored. Further, the objects to be weighed are fed from the supply hopper 3 to the weighing chambers 4a and 4b which are discharged and empty.
  • the combination calculation is performed at the combination time t3 after the stabilization time t2 has elapsed, and the combination of the measuring chambers 4a and 4b to be discharged next is obtained.
  • the simulation condition is that the combination target weight is 1000 g, the target weight to be input from the supply hopper to each weighing chamber (input target weight) is 25% (250 g) of the combination target weight, and the actual weight is supplied from the supply hopper to each measurement chamber. Throw The standard deviation of the input weight was set to 40% (100 g) of the target input weight. Under this condition, the number of weighing chambers that can be selected in one combination is 3-6. In addition, in the combination calculation performed in the simulation, the weighing chamber of the combination that is equal to or greater than the total weight force combination target weight of the input objects to be weighed and that minimizes the difference from the combination target weight is selected. The total weight was taken as the combined weight.
  • the objects to be weighed are discharged from the weighing chambers selected for the combination.
  • the supply hopper 3 is forced out of the two weighing chambers 4a and 4b of the corresponding weighing hopper 4.
  • the object to be weighed can only be supplied to one weighing chamber.
  • both weighing chambers 4a and 4b of a weighing hopper 4 are selected at the same time in the combination calculation, the force to discharge the object to be weighed from both weighing chambers 4a and 4b of the weighing hopper 4
  • an object to be weighed is fed from the supply hopper 3 into one of the two weighing chambers 4a and 4b, but the object to be weighed is not loaded into the other weighing chamber.
  • both weighing chambers 4a and 4b of a certain weighing hopper 4 are simultaneously
  • the number of weighing hoppers 4 that can be selected for the combination is limited (hereinafter, the number of hoppers that can be selected simultaneously in two rooms) is set to 0
  • the number of hoppers that can be selected simultaneously in two rooms is set to 0.
  • a simulation was performed in which the weighing cycle T was continuously performed 9999 times. The results are shown in Fig. 3.
  • both weighing chambers 4a and 4b can be combined at the same time when there is no limit on the number of hoppers that can be selected simultaneously.
  • the maximum number of weighing hoppers 4 that can be selected is three.
  • the number of weighing hoppers installed is the number of weighing hoppers 4 provided in the combination weigher.
  • the average weight is the average weight of the combination weights obtained by the combination calculation in each weighing cycle T.
  • the value obtained by subtracting the average weight in each case from the average weight in the case of no restriction is calculated, and the calculated value is shown in Figure 3 as the difference from the case of no restriction.
  • the average weight when the number of hoppers that can be selected simultaneously in two rooms is zero is the average when there is no limit in any configuration of four to nine weighing hoppers. If the number of hoppers that can be selected at the same time is larger than the weight, the average weight is equal to or less than the case where there is no restriction. Therefore, when the number of hoppers that can be selected simultaneously in two rooms is set to 1, the average weight is the closest to the combined target weight, and it is possible to improve the weighing accuracy. If there are no restrictions on the number of hoppers that can be selected simultaneously for two chambers, there may be two or three weighing hoppers 4 in which both weighing chambers 4a and 4b are selected for combination.
  • the weighing accuracy may be reduced.
  • the number of hoppers that can be selected simultaneously for two rooms is 0, the number of combinations is always small, and the weighing accuracy is considered to be reduced.
  • the force provided with the dispersion feeder 1, the linear feeder 2 and the supply hopper 3 are not limited. Depending on the type, etc., other configurations may be used. For each weighing hopper 4 with two weighing chambers 4a and 4b, one of the two weighing chambers is measured for each discharge. What is necessary is just to be provided with the supply means which can supply a thing. Further, as described above, the collective hopper 7 may be provided as necessary.
  • the control unit 10 includes a plurality of control devices that are not necessarily configured by a single control device, and the control unit 10 is configured to control the operation of the combination weigher in cooperation with each other. Moyore.
  • the present invention is useful for improving the weighing accuracy in a combination weigher including a plurality of weighing hoppers each having two weighing chambers.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Weight Measurement For Supplying Or Discharging Of Specified Amounts Of Material (AREA)
  • Supply Of Fluid Materials To The Packaging Location (AREA)

Abstract

Cette invention concerne une balance universelle qui comprend une pluralité de trémies de pesage (4) avec chacune deux chambres de pesage (4a, 4b), pour peser les objets chargés dans les chambres et pouvant déverser ces objets pour chaque chambre, une pluralité de trémies de chargement (3) disposées au-dessus des trémies de pesage en fonction de celles-ci et permettant de charger de manière sélective les objets pesés dans les deux chambres de pesage de chaque trémie de pesage correspondante et une unité de contrôle (10) afin de sélectionner une combinaison de chambres de pesage de sorte que le poids total des objets chargés coïncide avec une plage déterminée et réaliser une opération de déchargement pour déverser les objets pesés des chambres de pesage sélectionnées. L’opération s’effectue à l’aide d’un calcul de combinaison basé sur le poids des objets dans les chambres de pesage des trémies de pesage. L’unité de contrôle (10) réalise l’opération de combinaison en limitant la quantité des trémies de pesage (4) dont les deux chambres de pesage (4a, 4b) sont simultanément sélectionnées suivant une quantité déterminée ou inférieure.
PCT/JP2005/020563 2004-11-25 2005-11-10 Balance universelle WO2006057165A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20050805980 EP1832856B1 (fr) 2004-11-25 2005-11-10 Balance
US11/720,073 US7667147B2 (en) 2004-11-25 2005-11-10 Controller for a combination weigher

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004339920A JP2006153462A (ja) 2004-11-25 2004-11-25 組合せ秤
JP2004-339920 2004-11-25

Publications (1)

Publication Number Publication Date
WO2006057165A1 true WO2006057165A1 (fr) 2006-06-01

Family

ID=36497903

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2005/020563 WO2006057165A1 (fr) 2004-11-25 2005-11-10 Balance universelle

Country Status (6)

Country Link
US (1) US7667147B2 (fr)
EP (1) EP1832856B1 (fr)
JP (1) JP2006153462A (fr)
CN (1) CN100593108C (fr)
TW (1) TWI276784B (fr)
WO (1) WO2006057165A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006153462A (ja) * 2004-11-25 2006-06-15 Yamato Scale Co Ltd 組合せ秤
WO2006057164A1 (fr) * 2004-11-25 2006-06-01 Shozo Kawanishi Balance universelle
JP5178304B2 (ja) * 2008-04-23 2013-04-10 勝三 川西 組合せ秤
JP5389272B2 (ja) * 2010-10-29 2014-01-15 大和製衡株式会社 ホッパゲート開閉機構
EP3617668B1 (fr) * 2017-04-28 2021-10-20 Shozo Kawanishi Balance à combinaison
EP4375626A1 (fr) 2022-11-25 2024-05-29 Nexes Control Design Engineering S.L.U. Procédé et système pour rassembler un certain nombre d'articles avec un poids total cible

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0261406A2 (fr) 1986-08-25 1988-03-30 Package Machinery Company Méthode de pesage combinatoire et appareil utilisant des bascules multi-bin
JPH04118528A (ja) * 1990-09-10 1992-04-20 Tokihisa Masuda 組合せ計量の装置と方法
JPH0587766B2 (fr) 1991-02-12 1993-12-17 Anritsu Corp
JPH0627664B2 (ja) 1986-12-31 1994-04-13 アンリツ株式会社 組合せ計量装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60211319A (ja) 1984-04-05 1985-10-23 Ishida Scales Mfg Co Ltd 自動計量装置における組合せ計量方法
JPH0610629B2 (ja) * 1985-12-02 1994-02-09 大和製衡株式会社 組合せ秤
JP4212024B2 (ja) 2002-06-18 2009-01-21 三菱レイヨン株式会社 浄水器及びその洗浄方法
JP2006153462A (ja) * 2004-11-25 2006-06-15 Yamato Scale Co Ltd 組合せ秤
WO2006057164A1 (fr) * 2004-11-25 2006-06-01 Shozo Kawanishi Balance universelle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0261406A2 (fr) 1986-08-25 1988-03-30 Package Machinery Company Méthode de pesage combinatoire et appareil utilisant des bascules multi-bin
JPH0627664B2 (ja) 1986-12-31 1994-04-13 アンリツ株式会社 組合せ計量装置
JPH04118528A (ja) * 1990-09-10 1992-04-20 Tokihisa Masuda 組合せ計量の装置と方法
JPH0587766B2 (fr) 1991-02-12 1993-12-17 Anritsu Corp

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1832856A4

Also Published As

Publication number Publication date
EP1832856A4 (fr) 2011-02-09
JP2006153462A (ja) 2006-06-15
CN101061377A (zh) 2007-10-24
US7667147B2 (en) 2010-02-23
EP1832856B1 (fr) 2015-05-06
EP1832856A1 (fr) 2007-09-12
TW200622203A (en) 2006-07-01
TWI276784B (en) 2007-03-21
CN100593108C (zh) 2010-03-03
US20080190671A1 (en) 2008-08-14

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